I vote for the Campy Ergo option. If I was limited to just one bike, it would have Campy Ergo 8,9, or 10 speed. Fortunately I have several bikes and I enjoy the shifting on them all, and like switching back and forth. The one shifting mode I have used and didn’t like was 9 speed friction; Shimano in this case with bar ends. I think the narrow cog spacing makes the shifts and trimming too finicky. YMMV.
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N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '82 Colnago Super, '95 Gios Compact Pro, '95 Carrera Zeus, '84 Basso Gap, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, '84 Paletti Super Prestige, Heron Randonneur